In the above example, swp17-19 are connected to the same switch and spanning-tree has disabled 2 of the connections as indicated with the "Disa" at the end of each line. This is correct behavior in this scenario. To get all 3 ports working in tandem at the same time, you could bond the ports together to form an LACP EtherChannel.

Now you can see all the MAC addresses (machine specific) and which ports (front panel port) they are tied to. With the above output, only swp19 has a device hooked into it, as indicated by the no under is local?.

You Do not Remember which Port a Device Is Hooked up to, or which Bridge

Symptoms

Multiple bridges are configured,

And you have the MAC address of the device.

Solution

Use the bridge fdb show command to see multiple bridges and their associated MAC addresses: